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No, we call something mafic if it has a relative low silica content. As quartz is 100% silica, it's not mafic, but felsic.
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∙ 13y ago
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What minerals are found in mafic rocks?
mafic rocks can be made up of orthoclase feldspar and quartz
Is olivine mafic or felsic?
Olivine is a mafic mineral. It is most abundant in ultramafic rocks.
How can mineral composition affect the color of an igneous rock?
Silicate minerals can be light or dark, but Mafic minerals are dark, which is why Basalt appears dark, while Granite is light because Quartz is also light (in colour, not density).
What are mafic rocks?
A mafic rock is composed of mafic minerals such as biotite mica, amphibole, proxene, and olivine. The actual word mafic refers to magnesium and iron; nevertheless, these minerals are called ferromagnesian. Mafic rocks include gabbro, scoria, and basalt. They each have about 46-85% mafic mineral crystals. Periodite, 86-100% mafic minerals, is considered ultramafic because of its olivine composition.
What does the color of an igneous rock tell us about its mineral composition?
It tells us if the rock is Mafic (dark) composed mostly of magnesium and ferrum Or Felsic, (light) composed mostly of silicates such as quartz and feldspbar, or intermediate, a mixture of the two.
Is quartz monzonite mafic or felsic?
Quartz monzonite ranges from intermediate to felsic.
What minerals are found in mafic rocks?
mafic rocks can be made up of orthoclase feldspar and quartz
What 3 elements do mafic rocks contain?
silicate oxygen and quartz
What is alaskite?
A plutonic rock consisting of oligioclase, microcline and quartz with subordinate muscovite and little or no mafic minerals. An alkali granite with no mafic minerals
Is diorate a metamorphic rock?
No, diorite is a simply an igneous rock with lots of mafic minerals and quartz.
An acid igneous rock A always contains quartz B never contains quartz C would be mafic D b and c above?
The best anwser would be A, that they contain quartz.
What mineral composition is most characteristic of felsic rocks?
felsic is orthoclase, quartz, and biotite. mafic is olivine, pyroxene, and calcium rich plagioclase. I am still researching intermediate.
What minerals are common in both felsic and marfic igneous rocks?
Biotite and muscovite micas, quartz, magnetite, olivine, amphiboles, and feldspars.
Minerals in igneous rock?
Felsic rocks mostly contain silicates such as feldspars and quartz, mafic rocks are ferrromagnesian, containing mostly pyroxene and olivine, ultramafic rocks only contain pyroxene and olivine, and rocks neither felsic nor mafic mostly contain plagioclase feldspar, biotite mica, and amphibole.
What is the difference between felid and mafic?
Felsic rocks have 0-15% mafic crystals, while mafic rocks have 46-85% mafic crystals.
Which kind of magma is more likely form a volcanic rock?
Rhyolitic magma, high in quartz and feldspar. Forms granite underground, rhyolite above ground.
How do you get hot head in aqw?
It drops from the Mafic Dragon in Mafic.
